A Single-Trim Frequency Reference System With 0.7 ppm/°C From −63 °C to 165 °C Consuming 210 μW at 70 MHz

70 MHz CMOS Gm - C Bandpass Filter

This paper discusses a shunt active ûlter intended for installation on a power distribution system. The active ûlter has an additional capability to regulate the distribution line voltage by means of adjusting reactive power. Theoretical analysis investigates the dynamic performance of combined harmonic damping and voltage regulation. As a result, harmonic damping makes it possible to improve t...

A 1.02nW PMOS-only, trim-free current reference with 282ppm/°C from -40°C to 120°C and 1.6% within-wafer inaccuracy

A 1.02nW current reference is designed with only PMOS transistors, thereby providing inherently low process variation and enabling trim-free operation. Thirty-two measured chips from 5 corner wafers in 180nm CMOS technology show an untrimmed within-wafer spread (σ/μ) of 1.6% and across-corner wafer-to-wafer spread of ±4.7%. The measured average temperature coefficient is 282ppm/°C from −40°C to...

A 95-nA, 523ppm/°C, 0.6-μW CMOS current reference circuit with subthreshold MOS resistor ladder

A 1-μW 600-ppm/◦C Current Reference Circuit Consisting of Subthreshold CMOS Circuits

A low-power CMOS current reference circuit was developed using a 0.35-μm standard CMOS process technology. The circuit consists of MOSFET circuits operating in the subthreshold region and uses no resistors. It compensates for the temperature effect on mobility μ and threshold voltage VTH of MOSFETs and generates a reference current that is insensitive to temperature and supply voltage. Theoreti...

ar X iv : c s . C C / 0 70 20 47 v 1 8 Fe b 20 07 Hierarchical Unambiguity ∗

We develop techniques to investigate relativized hierarchical unambiguous computation. We apply our techniques to generalize known constructs involving relativized unambiguity based complexity classes (UP and Promise-UP) to new constructs involving arbitrary higher levels of the relativized unambiguous polynomial hierarchy (UPH). Our techniques are developed on constraints imposed by hierarchic...